I've seen a few of the zeenut horizontals over the year. McCarl and Halla I've seen the most often. Cartwright from the z14 set is a bit tougher. Baker from the z12 set is the toughest I've seen of the four and I've only seen one of it.
I think I've seen a couple of the t210 Morris cards and owned the one shown above in the scan. I think I got it from Chris in fact
I saw one other one made available about the same time I sold mine a few years ago. Don't think I've seen a Morris since though...
I think the price you saw on the Benny last night is quite indicative of the premiums involved on some the cards were discussing here so that price seems about right to me. Maybe a bit less for McCarl, Cartwright and leard. But horizontals like the Halla have been significantly more ...